Valve mechanism for door-checks.



J. U. REGAN.

VALVE MECHANISM FOR DOOR CHECKS.

APPLICATION FILED APR.6, 1911.

1,018,268. Patented Feb. 20, 1912.

WITNESSES INVENTOR amz w 4, @W ,W

COLUMBIA PLANOGRM'H Canvasummon u L UNITED @TATES PATENT @FFIQE.

JOSEPH C. REG-AN, 0F STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE 82;TOWNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

VALVE MECHANISIII FOR DOOR-CHECKS.

Specification of Letters Patent.

Patented Feb. 20, 1912.

Application filed. April 6, 1911. Serial No. 619,427. 7

To all whom it may concern:

Be it known that I, JosnPH C. REGAN, of Stamford, in the county ofFairfield and State of Connecticut, have invented certain new and usefulImprovements in Valve Mechanism for Door-Checks; and I do hereby declarethe following to be a full, clear, and exact description of theinvent-ion, such as will enable others skilled in the art to which itappertains to make and use the same.

My invent-ion relates to an improvement in valve mechanism for doorchecks, and it consists in the parts and combination of parts and in thedetails of construction as will be more fully described and pointed outin the claims.

In the accompanying drawings, Figure 1 is a View in plan of a portion ofa door check and closer embodying my improvement, and Fig. 2 is a viewin vertical longitudinal section of same.

1 represents the casing of a door check and closer, divided by a centralpartition 2 into an upper chamber 3 which contains the spring, and alower chamber 4 which con tains the liquid and in which the piston 5moves. The partition 2 is provided with an opening which is closed by apacking nut having a central opening for the passage of a spindle, thelatter being connected to the piston so as to actuate the latter, theabove parts being common in liquid door checks and closers.

A section of the wall of chamber 4 is thickened as at 6, and is providedwith a port 7, leading from the passage 8 to the compression chamber 9,which latter is simply an enlarged continuation of the port 7 connectingthe latter and the liquid chamber l near the end of the latter, andbeyond the stroke of the piston, so that it will not be wholly coveredby the piston during the compressive stroke of the latter. The passage 8is also located in the thickened wall 6 of the liquid chamber, andextends from the port 7 to a point in rear of the piston, thus providingfor the passage of liquid from a point in front of the piston to a pointin rear of the same, and also providing for the return of the liquidfrom the rear of the piston to the front thereof.

Located within the compression chamber 9 is the ball valve 10, thelatter being of a size sufficient to close the lower end of the port 7.The top wall or roof of the compression chamber 9, which is the seat forthe valve 10, is preferably made slightly conical soas to cause the ballvalve to seat itself centrally with relation to the port, and the valveis held in place within said chamber by the pin 11, the latter beingsufficiently removed from the lower end of port 7, so that when the ballvalve is resting on the pin ample clearance will be left for the freepassage of liquid from the compression end of liquid chamber 4, intopassage 8, or from the liquid chamber in rear of the piston, throughpassage 8 and port 7 into the liquid chamber in front of the piston.

Mounted in the thickened portion 6 of the wall of the liquid chamber,and in line with the port 7 is the'regulating screw 12. The shank ofthis screw has threadedengagement with the wall of the liquid chamber,wherby a turning movement of the screw moves same longitudinally, andthe end of the shank is reduced in size to rest within port 7 withoutmaterially obstructing same.

In the operation of the device the forward movement of the piston forcesthe ball valve 10 outwardly, either against the reduced end of theregulating valve 12 or against its seat. If the adjusting screw bewithdrawn sufficiently to permit the ball to engage its seat, the port 7will be closed, and the flow of liquid prevented from the forward end ofthe liquid chamber. By adjusting the screw 12 more or less toward thevalve 10, the latter will be prevented from seating itself, thus leavinga space around same for the escape of the liquid. During the reversemovement of the piston, the ball valve will fall onto its supporting pin11, thus leaving the port open for the free passage of the liquid fromthe rear to the front of the piston. With this construction, by simplyadjusting the screw any desired amount of liquid may be allowed to passthrough the port and passage at the will of the operator, and byremoving the screw entirely from the ball, the latter will, when thereis liquid under compression in the forward part of the cylinder, beforced to its seat and completely out ofi the escape of liquid from infront of the piston. By

this improvement, I obtain absolute control of the liquid by a mostsimple, economical and effective means.

It is evident that many slight changes might be resorted to in therelative arrangement of parts shown and described without departing fromthe spirit and scope of my invention. Hence I would have it understoodthat I do not wish to confine myself to the exact construction andarrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. The combination with a liquid chamher, a piston therein, a passage inthe wall of said chamber and communicating with the. latter in rear ofthe piston and a port connecting said passage and liquid chamber infront of the piston and having a seat therein for the valve, of anunsupported ball valve located in a position to close the port andmovable away from its seat by gravity, and a valve stem disconnectedfrom the valve and adapted to control the position of the valve relativeto its seat whereby the escape of the liquid may be regulated andcontrolled.

2. The combination with a liquid cham ber, a piston therein, a passagein the wall of said chamber, and communicating with the latter in rearof the piston, a port connected with said passage and a compressionchamber connecting the port and liquid chamber in front of the piston,of an unsupported ball valve located within said compression chamber forregulating the flow ,of liquid through said port, and a valve adjustingstem disconnected from the valve.

In testimony whereof, I have signed this specification in the presenceof two subscrlbing witnesses.

JOSEPH O. REGAN. Witnesses:

SCHUYLER MERRITT, CHARLES E. VAIL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

